Continuously variable transmission
US7238136B2 · kind B2 · utility
168Cited by
96References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2005 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Sep 10, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/65
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variable speed transmission having a plurality of tilting balls and opposing input and output discs is illustrated and described that provides an infinite number of speed combinations over its transmission ratio range. The use of a planetary gear set allows minimum speeds to be in reverse and the unique geometry of the transmission allows all of the power paths to be coaxial, thereby reducing overall size and complexity of the transmission in comparison to transmissions achieving similar transmission ratio ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.